SB2019100909 - Ubuntu regressions update for Firefox
Published: October 9, 2019 Updated: October 9, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 17 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2019-5849)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Skia graphics library. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.
2) Buffer overflow (CVE-ID: CVE-2019-11734)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary errors when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
3) Buffer overflow (CVE-ID: CVE-2019-11735)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary errors when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
4) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11737)
The vulnerability allows a remote attacker to bypass CSP.
The vulnerability exists due to incorrect implementation of Content Security Policy (CSP) directive if a wildcard ('*') is specified for the host. A remote attacker can bypass CSP restrictions and gain unauthorized access to the application.
Impact from this issue depends on the web application architecture and may result in information disclosure.
5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11738)
The vulnerability allows a remote attacker to bypass CSP.
The vulnerability exists due to incorrect processing of Content Security Policy (CSP) directive if a hash-based source takes the empty string as input, that leads to execution of any javascript: URIs.
6) Buffer overflow (CVE-ID: CVE-2019-11740)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary errors when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
7) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11742)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to the way the same origin policy is applied to cached images in a combination of SVG filters and a element. A remote attacker can violate same-origin policy and access images from another domain.
8) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11743)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to incorrect implementation of the unload event. A remote attacker can create a specially crafted web page, trick the victim into visiting and gain access to user's history through timing side-channel attacks.
9) Cross-site scripting (CVE-ID: CVE-2019-11744)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data within
10) Use-after-free (CVE-ID: CVE-2019-11746)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error while manipulating video elements if the body is freed while still in use. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger use-after-free error and execute arbitrary code on the target system with privileges of the current user.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
11) Incorrect permission assignment for critical resource (CVE-ID: CVE-2019-11748)
The vulnerability allows a remote attacker to collect sensitive information.
The vulnerability exists due to the WebRTC in Firefox honors persisted permissions given to sites for access to microphone and camera resources even when in a third-party context. A remote attacker that can create a specially crafted webpage that loads a trusted resource and trick the browser into allowing usage of microphone and camera resources.
12) Information disclosure (CVE-ID: CVE-2019-11749)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an error in WebRTC that allows malicious web content use probing techniques on the getUserMedia API with constraints to reveal device properties of cameras on the system without triggering a user prompt or notification. A remote attacker can use such behavior to fingerprint users.
13) Type Confusion (CVE-ID: CVE-2019-11750)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a type confusion error in Spidermonkey. A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger a type confusion error and crash the affected application.
14) Use-after-free (CVE-ID: CVE-2019-11752)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when extracting a key value in IndexedDB. A remote attacker can create specially crafted webpage, trick the victim into visiting it, trigger a user-after-free error by deleting the IndexedDB key value and subsequently make the application try to extract it during conversion.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
15) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-9812)
The vulnerability allows a remote attacker to escape sandbox restrictions.
The vulnerability exists due to a combination of issues related to a compromised sandboxed content and the Firefox Sync ability to synchronize data with the malicious account. A remote attacker can can compromise a sandboxed content process using a different vulnerability, and then escape that sandbox by loading accounts.firefox.com in that process and forcing a log-in to a malicious Firefox Sync account. Preference settings that disable the sandbox are then synchronized to the local machine and the compromised browser would restart without the sandbox if a crash is triggered.
16) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-11741)
The vulnerability allows a remote attacker to perform UXXS attacks.
The vulnerability exists due to insufficient isolation of addons.mozilla.org and accounts.firefox.com. A remote attacker can use another vulnerability to compromise a sandboxed process and use it to perform universal cross-site scripting attacks (UXXS). As a result, a remote attacker can modify a user's Firefox configuration.
17) Resource management error (CVE-ID: CVE-2019-11747)
The vulnerability makes HSTS feature ineffective.
The vulnerability exists due to incorrect implementation of the "Forget about this site" feature in the History pane, intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored.
Remediation
Install update from vendor's website.